*{
	margin: 0;
	padding: 0;
}
#imgs{
	position: relative;
}
	
#nav{
	position: absolute;
	left: 50%;
	transform: translateX(-50%);
}
#nav li{
	list-style: none;
	width: 25px;
	height: 5px;
	background-color: #000;
	opacity: .3;//透明度
	filter: alpha(opcity=30);
	float: left;
	margin-left: 20px;
	padding-left: 20px;
	margin-top: 650px;
	cursor: pointer;
	
}
#nav .select{
	background-color: #FFFFFF;
	opacity: .6;
}
#imgs div{
	text-align: center;
	position: absolute;
	margin-left: 500px;
	margin-top: 200px;
	transiton:all 1s ease;
	
}
#imgs img{
	width: 900px;
	height: 500px;
}
